He was the son of Thomas Forbes, a burgess of
Aberdeen, descended from the Corsindac branch of that house, by his wife, Janet, the sister of the botanist
James Cargill. Born at Aberdeen in 1585, he was educated at the
Marischal College, graduating A.M. in 1601. Very soon after he held the chair of logic in the same college, but resigned from it in 1606 to pursue his studies on the continent. He travelled through Poland, Germany, and Holland, studying at several universities, and meeting
Scaliger,
Grotius, and
Vossius. Returning after five years to Britain, he visited Oxford, where he was invited to become professor of Hebrew, but he pleaded ill-health. Ordained, probably by Bishop
Peter Blackburn of Aberdeen, he became minister successively of two rural Aberdeenshire parishes,
Alford and
Monymusk; in November 1616 (pursuant to a nomination of the general assembly) he was appointed one of the ministers of Aberdeen; and at the Perth assembly in 1618 was selected to defend the lawfulness of the article there proposed for kneeling at the holy communion. In the same year, in a formal dispute between him and Aidie, then principal of Marischal College, he maintained the lawfulness of
prayers for the dead. Such doctrines would not have been tolerated elsewhere in Scotland, but in Aberdeen they were received with favour, and on Aidie's enforced resignation in 1620 the town council of the city, who were patrons of Marischal College, made him the principal, specifying that he should continue his preaching. At the end of 1621, he was chosen one of the ministers of
St Giles Cathedral in Edinburgh, being admitted in March 1622. In 1625 when the church was split into quarters, Forbes was given the south-east quarter (known as the Old Kirk) in January 1626. At his request, on grounds of ill-health, he transferred back to his native
Aberdeen on
Michaelmas 1626. His zeal for the observance of the Perth articles was distasteful to many, and when he taught that the doctrines of the Catholics and the Reformed could in many points be easily reconciled, there was disorder. Five of the ringleaders were dealt with by the privy council; but Forbes felt that his ministry at Edinburgh was a failure, and more trouble arising from his preaching in support of the superiority of bishops over presbyters, he returned to Aberdeen, where in 1626 he resumed his former post. In 1633, when Charles I was in Scotland for his coronation, Forbes preached before him at
Holyrood, and his sermon so pleased the king that he declared the preacher to be worthy of having a bishopric created for him. Shortly afterwards the
see of Edinburgh was erected; Forbes was nominated to it, and was consecrated in February 1634. In the beginning of March he sent an injunction to his clergy to celebrate the
Eucharist on
Easter Sunday to take it themselves on their knees, and to minister it with their own hands to every one of the communicants. When Easter came he was very ill, but he was able to celebrate in
St. Giles' Cathedral; on returning home he took to bed, and died on the following Saturday, 12 April 1634, in the year of his 49th birthday. He was buried in his cathedral; his monument was afterwards destroyed, but a copy of the inscription is in
William Maitland's
History of Edinburgh. He was married, and left a family, of whom one, Arthur, is said to have become Professor of Humanities at St. Jean d'Angel, near La Rochelle, while another, Thomas, entered the Catholic Seminary, the
Scots College, Rome, and eventually entered the service of
Cardinal Carlo Barberini. ==Works==